This was confirmed by Device in this tweet wherein he states that Notan1dgl, while promising is over with Astralis. This has paved way for several rumor mills to resurface as to who the fifth player for Astralis would be.

Many believe it will be glaive and if that is the case, the Astralis team would be really formidable indeed.

However this also begets a question; Why bench Karrigan for a mere 4 games? Maybe there is more to meet the eye than is visible at the Astralis camp.